Add Interest to Your Yard with a Pergola

Up on the Roof -Nearly any garden space can host a pergola -- even a rooftop garden. If you want a pergola such as this, it just takes a little more planning. Be sure your rooftop can support the weight of the pergola -- and be sure your pergola is sturdy enough that the wind won't knock it down (or give it extra support by attaching it to the roof